So far as I know you have to uninstall the program and then reinstall it minus the SR2.

Move your runtime folder out of the poser folder first! Then copy it back.  I read in another thread that someone uninstalled and reinstalled without saving their runtime thinking that like poser 5 and 6 that Poser wouldn't delete the old runtime.  They ended up losing all of their stuff.

So make sure you save that runtime before deleting anything :)

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi